Question

1. pulmonary ventilation is?

the way oxygen enters the lungs from the surroundings
the way oxygen gets from the lungs into the blood
the passage to the heart from the lungs

1. external respiration is?

the way oxygen enters the lungs from the surroundings
the way oxygen gets from the lungs into the blood
the passage to the heart from the lungs.

Explanation:

Pulmonary ventilation is the process of air moving into and out of the lungs, which is the way oxygen enters the lungs from the surroundings. External respiration is the exchange of gases between the lungs and the blood, so it is the way oxygen gets from the lungs into the blood.

Answer:

1. The way oxygen enters the lungs from the surroundings
2. The way oxygen gets from the lungs into the blood